In my early twenties I lived in a house that hosted several swinger parties. 2 regulars that came to our parties was a state police officer and his wife. I had slept with his wife many times. Sometimes we had an audience sometimes it was private.
One night her husband decided to watch us in the privacy of my room. After a solid 15 minutes or so he disrobed and got on the bed with us. My expectations were that he wanted a turn with his wife. So I pulled out and moved to the side.
But to my surprise, he stops me and say “stay there.” I wasn’t quite sure what his intentions were. But as a sex addict. I’m always down for anything. So I began to fuck his wife again.
Almost immediately after I slide it in her. He proceeded to push his hard dick inside my ass.
My cock began to throb harder than it had in some time. It was an amazing turn on. I was right in the middle. I would thrust forward into her and she would moan. When I would slide out I would use my hips and push him deeper inside me.